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Theorem bj-1uplex 37505
Description: A monuple is a set if and only if its coordinates are sets. (Contributed by BJ, 6-Apr-2019.)
Assertion
Ref Expression
bj-1uplex (⦅𝐴⦆ ∈ V ↔ 𝐴 ∈ V)

Proof of Theorem bj-1uplex
StepHypRef Expression
1 bj-pr11val 37502 . . 3 pr1𝐴⦆ = 𝐴
2 bj-pr1ex 37503 . . 3 (⦅𝐴⦆ ∈ V → pr1𝐴⦆ ∈ V)
31, 2eqeltrrid 2870 . 2 (⦅𝐴⦆ ∈ V → 𝐴 ∈ V)
4 df-bj-1upl 37495 . . 3 𝐴⦆ = ({∅} × tag 𝐴)
5 p0ex 5346 . . . 4 {∅} ∈ V
6 bj-xtagex 37486 . . . 4 ({∅} ∈ V → (𝐴 ∈ V → ({∅} × tag 𝐴) ∈ V))
75, 6ax-mp 5 . . 3 (𝐴 ∈ V → ({∅} × tag 𝐴) ∈ V)
84, 7eqeltrid 2869 . 2 (𝐴 ∈ V → ⦅𝐴⦆ ∈ V)
93, 8impbii 212 1 (⦅𝐴⦆ ∈ V ↔ 𝐴 ∈ V)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 209  wcel 2145  Vcvv 3457  c0 4288  {csn 4585   × cxp 5650  tag bj-ctag 37471  bj-c1upl 37494  pr1 bj-cpr1 37497
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-rep 5232  ax-sep 5251  ax-nul 5261  ax-pow 5327  ax-pr 5395  ax-un 7722
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3080  df-rex 3090  df-rab 3418  df-v 3459  df-sbc 3748  df-csb 3856  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-pw 4560  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-br 5106  df-opab 5168  df-xp 5658  df-rel 5659  df-cnv 5660  df-dm 5662  df-rn 5663  df-res 5664  df-ima 5665  df-bj-sngl 37463  df-bj-tag 37472  df-bj-proj 37488  df-bj-1upl 37495  df-bj-pr1 37498
This theorem is referenced by:  bj-2uplex  37519
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